def make_shirt(size,t):
    if t =='':
        print('这件衣服的尺寸是:'+size + '; 印花文字为:'+'空')
    else:
        print('这件衣服的尺寸是:' + size + '; 印花文字为:' + t)
        make_shirt('XXXL','')
        make_shirt('XXXL', t = 'hello_world')
def make_shirt(size,t='zhangzihui shi wo erzi.'):
    print('这件衣服的尺寸是:'+size+'; 印花文字为:'+t)
    make_shirt('大号')
    make_shirt('中号')
    make_shirt('小号','其他样式')
def describe_city(city_name,city_belong_country='China'):
    print(city_name+'is in '+city_belong_country)
a = describe_city('taian')
b = describe_city('jinan')
c = describe_city('旧金山','America')
print(a)
print(b)
print(c)